Most people are adapting from other science fiction games, that's how sad its's getting. I had a lofty dream of a rules set called traveller unification, designed to unify all of the versions of the game that went before it. It's not too hard to do until you try and get everyone to agree on what makes a rule set great, as mentioned, it's damaging to say these rules with x supplement are the best, because someone else will say, that some other version of traveller with Y rules are better and so on. What we should continue to do is support the development of stat less and rule less resources and adventures like the 1248 books that anyone can adapt to their own preferred rule set.
With OGL traveller coming soon, this fracturing of the community will only get worse.
I had to quote the whole thing, just because...
When you get to the bottom line this is the truth of the matter folks. No one will ever agree on which rules set is the best. The reasons are obvious. As grand an idea as a Unified rules set is, Cmdr. Drax is right, just as he is right in the further splintering of the Traveller Community by even more versions of the game coming out.
However, we are cursed (for lack of a better word) as RPG players to suffer this fate of being splintered. Someone regardless of the best intentions will always be ready willing and able to put out the next best and greatest editions of a game. When it comes out that many more people will stay behind with the old set and others will move forward and a few new folks will be added along the way to all the sets for the simple fact of publicity and they finding which edition they like best.
It is my wish as well that ALL new supplements be made non-rule set specific and non-milieu specific -- or at least have reference to each rule set. I know the last option is very difficult at this time now that there are 7 and soon to be 8 different rules sets.